Breathing the air outside their homes may be just as toxic to pregnant women - if not more so - as breathing in cigarette smoke, increasing a mom-to-be's risk of developing deadly complications such as preeclampsia, according to findings from a new University of Florida study.UF researchers compared birth data with Environmental Protection Agency estimates of air pollution, finding that heavy exposure to four air pollutants led to a significantly increased risk for developing a high blood pressure disorder during pregnancy.

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